Insulating floor construction.



ACLEITH.

R Taucnow.

Patented May 22, 1917.

W. D. IVI

ATING FLOO CONS LlcATloN FILED Dec.

'M1 f/H Il .Ari il UNITED sTATEs PATENT oEEToE.

WALTER D. MACLEITH, OF ST. PAUL, MINNESOTA, ASSIGNOR OF ONE-THIRD TOUNION FIBRE COMPANY, OF WINONA, MINNESOTA, A CORPORATION OF MINNESOTA. A

INSULATING- FLOOR CONSTRUCTION.

Specification of Letters lfatent.

Patented nay 22,1917.

Application led December 7, 1914. Serial No. 875,874.

To all whom t may concern.' f j Be it known that I, WALTER D. MAGLEITH,a citizen of the United States(I residing at St. Paul, in the county ofRamsey and State of Minnesota, have invented certain new and usefulImprovements in Insulating Floor Construction, of which the following isa specification.

My invention relates to improvements 1n insulating floor construction,its object being particularly to provide an lmproved insulatedconstruction of flooring and conpart 'of this specification,

Figure 1 is a side view of one corner of a fioor and connected wallbroken away embodying my improved features of invention; and l Fig. 2 isa vertical section on line -a of Fig. 1.

Referring to the drawings A represents a side wall of the room, 'andBspaced iioor joists. AIn building up the floor construction strips 2will first be securedl along the inne'r faces of the floor joists andupon these are positioned strips of insulation 3 supportin the flooring4. The iiooring 4, as showngbest in Fig. 2, projects above the upper(faces of the floor joists. Upon the flooring 4 is placed a sheet ofresilient insulating material 5, the raised position of theflooring'with respect to the joists leaving an air space, as shown inFig.l 2, between the joists and insulating material. Loosely laid uponthe top of the insulation 5 is the expanded metal 6. I then pour uponthe expanded metal 6 a composition layer 71 inv A a soft condition andof such a character that contained heavy matter will sink and form asolid mass embedding the expanded `"metal while the top of the layerwilltbe l ,lighter and resilient.

I preferably use in lforming this layer a composition of cork,

sawdust, sand, cement, and alum mixed in.

waterlgAs shown Itrowel the mixture up along the side wall, covering thelayer of material with suitable covering 8 as of linoleum.

The operation of the resilient insulation 3 and 5 with the air spaceabove the joists 60 and the particular character of composition l7result in making the oor soundproof to the maximum degree. I have foundwhen heavy weights are dropped upon the floor the resilient top of thecomposition layer 7 65 becomes slightly indented, and the strains arethrown out mostly in a lateral direction above the hard, more solidbottom of the composition layer. The expanded metal anchors and makesmore solid and firm 'the 70 lower hard portion of the compositionlayen Ihave found avery small amount of the shock or noise passing through thecomposi- .tion layer, and .what little does, is taken up by theinsulatmg materials and the air spaces. I thus secure a flooring that isessentially soundproof and highly efficient for hospital and similarpurposes.

I claim as my invention:

1. A floor construction of the class deso scribed comprising fioorsupporting joists, flooring arranged between said joists with its upperface standing above the upper faces of thejoists, `a resilientinsulating sheet positioned upon said fiooring leaving an air spaceabove the joists, and a composition layer upon said insulating sheet,said composition, layer being relatively, hard adjacent to theinsulating sheet and 'relatively i resilient at the top.

2. A floor construction of the class de-l scribed comprising fioorsupporting joists, flooring arranged between said joists with its upperface standing above the upper faces of the joists, a resilientinsulating 95 sheet positioned upon said iiooring leaving an air spaceabove the joists, a composition layer upon' said insulating sheet, saidcom'- position layer being relatively hard adja- 'cent to the insulatingsheet and relatively 100 resilient at the top, and anchoring expanded]metal embedded in the lower half of said composition. n

3. A floor construction of `the"A class described comprising oorsupporting joists, 105

a. space above said joists, and a composition position layer containingrelatively heavyv materials which will settle to the lower porf tion ofsaid composition and make the same4 firm and hard and containingmaterials which will leave the upper portion of said compositionmaterial relatively yielding.

4. A floor constructionv of the class described comprising floorsupporting joists, flooring arranged between said joists, with its upperface standing above the upper faces of Said joists, a resilientinsulating@ f sheet positioned upon said flooring leavinga space abovesaid joists, a composition layer upon said insulating sheet, saidcompositionlayer containingl relatively heavy materials leave the upperportion of said composition 20 material relatively yielding, andopenwork -metal embedded in the lower relatively harder portion of saidcomposition material for the purpose set forth.

ln testimony whereof turein presence of two witnesses. j

' WALTER D. MAGLETH. Witnesses:

',ALRTHUR P. LoTHRoP, H. SwvANsoN.

I affix my signa- 25

